Content Version ID List: First Value Displays Formula Instead of ID in Flows

I'm facing an issue with retrieving the first value from the ID List of the Content Version object when saving a file sent by users via Facebook Messenger (Einstein Bot) and passing the value to Flows.

When I print the variable using the Message Dialog, it correctly returns the ID value. However, when I pass the same variable to Flows, the value changes to the formula I used in the Set Variable Dialog to extract the first value from the ID List.

Has anyone encountered a similar issue or knows a workaround for this? 

Set Variable Dialog Source: Value 

Formula Used: {!List[Index]} 

Einstein Bot Dialog Flow:

Set Variable Dialog: 

Facebook Messenger:  

Error Logs Sent to Email: 

@Salesforce Flow Automation @* Service Cloud *